Vulnerability in Golang Protobuf
CVE-2021-3121
An issue was discovered in GoGo Protobuf before 1.3.2. plugin/unmarshal/unmarshal.go lacks certain index validation, aka the "skippy peanut butter" issue.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H.
EPSS exploit prediction
EPSS: 0.034 (88.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.035 · newest: 0.034 · change: -0.001
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/gogo/protobuf/commit/b03c65ea87cdc3521ede29f62fe3ce239267c1bc (Patch, Third Party Advisory)
- github.com/gogo/protobuf/compare/v1.3.1...v1.3.2 (Patch, Third Party Advisory)
- lists.apache.org/thread.html/r88d69555cb74a129a7bf84838073b61259b4a3830190e05a3… (mailing-list)
- lists.apache.org/thread.html/rc1e9ff22c5641d73701ba56362fb867d40ed287cca000b131… (mailing-list)
- security.netapp.com/advisory/ntap-20210219-0006/ (Third Party Advisory)
- discuss.hashicorp.com/t/hcsec-2021-23-consul-exposed-to-denial-of-service-in-go… (Third Party Advisory)
- lists.apache.org/thread.html/r68032132c0399c29d6cdc7bd44918535da54060a10a12b159… (mailing-list)
Frequently asked questions
- What is CVE-2021-3121?
- CVE-2021-3121 is a high-severity vulnerability in Golang Protobuf, classified under Improper Validation of Array Index. CVSS score: 8.6/10. Published 2021-01-11.
- How severe is CVE-2021-3121?
- High severity. CVSS v3 base score is 8.6 out of 10.
- Is CVE-2021-3121 known to be exploited?
- 11 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.